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3 years ago

What is the area of this trapezoid?

Mathematics

2 answers:

Anna [14]3 years ago

7 0

The anser is the second box circle thing

m_a_m_a [10]3 years ago

6 0

answer:

i believe the answer is c

good luck :) hopefully this helps

have a great day !!

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Is 35 in , 45 in , 55 in, a right triangle or not

KonstantinChe [14]

If its less than 90, its a right triangle. Hope this helps!

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3 years ago

a salesperson has averaged $120 in commissions for each of the past ten days. For how many days must her commissions average $16

Arada [10]

OKOK

A salesperson averaged $120 per 10 days sooo 120/10 is 12 so about 12 per day

So,
You guess the amount that could make up a number around 150or 160

So 12 x3 = 36 + 120=156 hallelujah!

So, 3 more days until she can average $160 in order to bring her overall average to 150%.....

Hope this helps. :::)))))

8 0

3 years ago

In October 2012, Apple introduced a much smaller variant of the Apple iPad, known as the iPad Mini. Weighing less than 11 ounces

nadya68 [22]

Answer:

a) 0.4286 = 42.86% probability that the battery life for an iPad Mini will be 10 hours or less

b) 0.2857 = 28.57% probability that the battery life for an iPad Mini will be at least 11 hours

c) 0.5714 = 57.14% probability that the battery life for an iPad Mini will be between 9.5 and 11.5 hours

d) 86 should have a battery life of at least 9 hours.

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The probability that we find a value X lower than x is given by the following formula.

$P(X \leq x) = \frac{x - a}{b-a}$

The probability of being higher than x is:

$P(X > x) = \frac{b - x}{b-a}$

The probability of being between c and d is:

$P(c \leq X \leq d) = \frac{d-c}{b-a}$

Assume that battery life of the iPad Mini is uniformly distributed between 8.5 and 12 hours.

This means that $a = 8.5, b = 12$

a. What is the probability that the battery life for an iPad Mini will be 10 hours or less (to 4 decimals)?

$P(X \leq x) = \frac{x - a}{b-a}$

$P(X \leq 10) = \frac{10 - 8.5}{12 - 8.5} = 0.4286$

0.4286 = 42.86% probability that the battery life for an iPad Mini will be 10 hours or less.

b. What is the probability that the battery life for an iPad Mini will be at least 11 hours (to 4 decimals)?

$P(X > x) = \frac{b - x}{b-a}$

$P(X > 11) = \frac{12 - 11}{12 - 8.5} = 0.2857$

0.2857 = 28.57% probability that the battery life for an iPad Mini will be at least 11 hours

c. What is the probability that the battery life for an iPad Mini will be between 9.5 and 11.5 hours (to 4 decimals)?

$P(c \leq X \leq d) = \frac{d-c}{b-a}$

$P(9.5 \leq X \leq 11.5) = \frac{11.5 - 9.5}{12 - 8.5} = 0.5714$

0.5714 = 57.14% probability that the battery life for an iPad Mini will be between 9.5 and 11.5 hours.

d. In a shipment of 100 iPad Minis, how many should have a battery life of at least 9 hours (to nearest whole value)?

Proportion of iPad Minis with a battery life of at least 9 hours.

$P(X > 11) = \frac{12 - 9}{12 - 8.5} = 0.8571$

Out of 100:

0.8571*100 = 85.71

To the nearest whole number

86 should have a battery life of at least 9 hours.

5 0

3 years ago

What is the equation of a circle with center (-7,4) and radius 8?

enot [183]

The answer to this question is
B. (x+7)²+(y-4)²=64

I hope this helps!!!!!!!

7 0

3 years ago

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The 1,840 rock concert tickets sold were twice the amount of jazz concert tickets sold. <br><br>

Vanyuwa [196]

Ur gay. Jeydydhushwusfb

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3 years ago

What is the area of this trapezoid?​

What is the area of this trapezoid?